A chiplessly formed bearing washer for a thrust bearing, comprising an angular thrust washer (1) comprising a radial portion (2) which forms a raceway and merges into at least one axial bend (3), said thrust bearing washer comprising a retention means in the form of projections (4) or recesses, the bent edges of the projections (4) or the edges of the recesses are provided with a stamping (7), whereby detrimental stresses occurring in the bent region are avoided.

Patent
   5846001
Priority
Mar 15 1997
Filed
Dec 19 1997
Issued
Dec 08 1998
Expiry
Dec 19 2017
Assg.orig
Entity
Large
9
9
EXPIRED
1. A chiplessly formed bearing washer for a thrust bearing, comprising an angular thrust washer (1) having a radial portion (2) which forms a raceway and merges into at least one axial bend (3), said bearing washer comprising a retention means in the form of projections (4) or recesses, characterized in that bent edges of the projections (4) or edges of the recesses are provided with a stamping (7).
2. An angular thrust washer of claim 1 wherein the stamping (7) is provided on one side in parts of a critical region.
3. An angular thrust washer of claim 1 wherein the stamping (7) is provided on both sides of a critical region.
4. An angular thrust washer of claim 1 wherein the stamping (7) is provided in parts of a critical region.

The invention concerns a chiplessly formed bearing washer for a thrust bearing, and more particularly, an angular thrust washer comprising a radial portion which forms a raceway and merges into at least one axial bend, said bearing washer comprising a retention means in the form of projections or recesses.

A thrust bearing washer of this type is known, for example, from DE 38 40 957 A1 wherein the thrust bearing washer shown in FIG. 4 of this prior art document comprises a radial portion forming a raceway. An axial bend extends along the inner periphery of the radial portion and comprises a retention tab which engages into a groove of a housing. In this way, a reliable retention of the thrust washer in the housing is realized. A drawback of the said construction is that high stresses occur particularly on the punched or bent edges of the retention means and have a negative effect on the thrust washer. Particularly high stresses can result if two adjacent radii are bent in opposite directions and this can lead to a breaking-off of the retention means or a fracture of the bearing washer.

It is an object of the invention to create a bearing washer for a thrust bearing having a retention means which has no negative effect on the bearing washer.

This and other objects and advantages of the invention will become obvious from the following detailed description.

The chiplessly formed bearing washer of the invention for a thrust bearing comprises an angular thrust washer (1) having a radial portion (2) which forms a raceway and merges into at least one axial bend (3), said bearing washer comprising a retention means in the form of projections (4) or recesses, is characterized in that bent edges of the projections (4) or edges of the recesses are provided with a stamping (7).

As known in the technical field, by stamping is meant a roundening of edges so that stresses in the region of punched or bent edges are reduced. This prevents a breaking-off of the retention means due to punching or bending, particularly in the case a of retention means having a complicated shape. Due to this reduction of stresses, there are also no negative repercussions on the thrust bearing washer as a whole, including the raceway region for the rolling elements.

According to a further feature of the invention, the stamping is made either on one side, or on both sides, or only in parts of the critical region.

The invention will now be described with the help of an example of an embodiment.

FIG. 1 is a partial perspective view of an angular thrust bearing washer compising a retention tab, and

FIG. 2 is a section taken along line 11--11 of FIG. 1.

The angular thrust washer 1 shown in FIGS. 1 and 2 comprises an annular radial portion 2 which serves as a raceway for a rolling element crown ring, not shown. At its outer diameter, the radial portion 2 merges into an axial bend 3 which comprises a radially oriented retention tab 4. This retention tab 4 engages into a recess of a housing, not shown, so that the angular thrust washer 1 is secured against rotation. Recesses 5 and 6 are arranged adjacent to the retention tab 4 in both peripheral directions.

As can be seen more particularly in FIG. 2, both the retention tab 4 and the recesses 5 and 6 are provided with stampings on both sides, so that, as described above, an occurrence of edge and bending stresses with the accompanying detrimental effect on the angular thrust washer 1 is prevented.

It is understood that the example of embodiment described herein does not limit the invention. Rather, the invention applies equally to all thrust bearing washers comprising a retention means of any kind i.e., also to thrust bearing washers with a retention means in the form of recesses.

Pfann, Heinz, Muntnich, Leo, Adler, Hellmut, Forisch, Peter

Patent Priority Assignee Title
10598212, Mar 31 2015 Shaeffler Technologies AG & Co. KG Axial retention and anti-rotation features for hydrodynamic thrust bearings
10634187, Jan 24 2018 Schaeffler Technologies AG & Co. KG Thrust bearing arrangement
10670075, May 14 2018 JTEKT Corporation Thrust roller bearing
6336868, Apr 06 1999 AMERICAN AXLE & MANUFACTURING, INC Universal joint with thrust washer
6467853, Aug 09 2000 Deere & Company Keyed anti-wear thrust washer structure
6533461, Aug 14 2001 Koyo Bearings North America LLC Anti-reversal and anti-rotation thrust washer
8894537, Jan 03 2011 Hamilton Sundstrand Corporation Anti-rotation for thrust washers in planetary gear system
9371854, Dec 16 2011 SCHAEFFLER TECHNOLOGIES AG & CO KG Radial roller bearing arrangement, in particular for a needle bushing
9765871, Dec 18 2013 SCHAEFFLER TECHNOLOGIES AG & CO KG Turbine assembly and method for a thrust washer installation on a turbine of a torque converter
Patent Priority Assignee Title
2606798,
3972574, Feb 25 1974 ROULEMENTS NADELLA S A A FRENCH CORP Thrust rolling bearing having cylindrical rolling elements
4981373, Jul 17 1987 KOYO SEIKO CO , LTD , Fixing structure for thrust roller bearing
5007746, Dec 26 1989 Federal-Mogul World Wide, Inc Thrust bearing with resilient retention tang
5139350, Nov 13 1987 GLYCO-METALL-WERKE GLYCO B V & CO KG Thrust friction bearing of laminate material
5335998, Jan 31 1992 INA Walzlager Schaeffler KG Axial bearing unit
AT342935,
DE2245739,
DE3840957,
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Executed onAssignorAssigneeConveyanceFrameReelDoc
Dec 19 1997INA Walzlager Schaeffler oHG(assignment on the face of the patent)
Feb 11 1998MUNTNICH, LEOINA WALZLAGER SCHAEFFLER OHCASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0090720255 pdf
Feb 11 1998FORISCH, PETERINA WALZLAGER SCHAEFFLER OHCASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0090720255 pdf
Feb 11 1998PFANN, HEINZINA WALZLAGER SCHAEFFLER OHCASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0090720255 pdf
Feb 11 1998ADLER, HELLMUTINA WALZLAGER SCHAEFFLER OHCASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0090720255 pdf
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